EP1064973B1 - Document with scratch-off layer precluding fraudulent reading - Google Patents
Document with scratch-off layer precluding fraudulent reading Download PDFInfo
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- EP1064973B1 EP1064973B1 EP99870136A EP99870136A EP1064973B1 EP 1064973 B1 EP1064973 B1 EP 1064973B1 EP 99870136 A EP99870136 A EP 99870136A EP 99870136 A EP99870136 A EP 99870136A EP 1064973 B1 EP1064973 B1 EP 1064973B1
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- European Patent Office
- Prior art keywords
- layer
- document
- pigments
- affixing
- optical effect
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F3/00—Board games; Raffle games
- A63F3/06—Lottos or bingo games; Systems, apparatus or devices for checking such games
- A63F3/065—Tickets or accessories for use therewith
- A63F3/0665—Tickets or accessories for use therewith having a message becoming legible after rubbing-off a coating or removing an adhesive layer
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F3/00—Board games; Raffle games
- A63F3/06—Lottos or bingo games; Systems, apparatus or devices for checking such games
- A63F3/065—Tickets or accessories for use therewith
- A63F3/0655—Printing of tickets, e.g. lottery tickets
Definitions
- the invention relates to printed documents supporting hidden confidential information by an opaque scrapable layer. This information does not can normally only be revealed after destruction by scraping of said layer.
- This category of documents includes in particular so-called "instant lottery” game tickets.
- the ticket buyer can immediately know the winning nature or not of its purchase by scratching the layer, operation which discovers the message or number concealed from below.
- Such a scratch-off layer can also be used on different types of documents - such as: gift voucher, sales voucher, etc. - which give rise, for example, to the award of a prize or a gift based on a message, a number, of icons, revealed by scraping the opaque layer.
- Any document bearing a part of information including the sender wishes to guarantee confidentiality, as for example a secret code to communicate to a person particular can also be provided with a layer scratch off.
- Document FR-2 595 987 describes an opaque layer made of brittle ink, covered with a design complicated print, such as a guilloche, so that the fraudster who would operate by abduction and replacement of the diaper would be imposed the very delicate additional work to reconstruct the drawing original overlay.
- WO 9640394 discloses a printing method multilayer supposed to make reproduction impossible after alteration of the scrapable layer.
- WO 95/14579 starts from another approach to the problem: crucial information is only printed on the document that at the time of the sale, via a thermal process controlled by a central computer.
- the ink covering information can react with certain solvents, so that any attempt to detach the layer is easily identified.
- thermochromic layer to avoid fraud. This document, however, does not, in particular, provide for the combination of several layers with optical effects individuals.
- An object of the invention is to obtain documents to scratch-off layer in which the hidden information is safe from fraud, notably due to scratching and of the fraudulent reconstruction of the masking layer this information, overlay or peel and redeposition of that layer.
- Another object of the invention is to obtain more scratch-resistant documents elaborate than that of a simple printed image even complicated, and whose visual effect is remarkable.
- Another object of the invention is that the control can be done at any time in the chain distribution, without the documents themselves affected.
- the object of the invention is a printed document carrying information of the confidential type masked by a removable opaque layer, the outer face of which comprises a layer containing pigments reacting by a reversible change in color to a variation in temperature hereinafter called "thermochromic layer", wherein the pigments are arranged in the opaque scrapable layer itself and / or the pigments are dispersed in a separate layer affixed on the external face of the opaque scrapable layer, the document comprising an external layer superimposed on the thermochromic layer.
- thermochromic layer a layer containing pigments reacting by a reversible change in color to a variation in temperature
- one of the layers covering confidential information includes pigments having a variable optical effect depending on the surrounding conditions.
- This variable optical effect depends, for example, on the angle from which an observer looks at the document.
- This variable optical effect can be obtained by a iridescent ink, or by a reactive ink reversible to ultraviolet radiation.
- this variable optical effect is obtained by affixing a holographic layer.
- the temperature at which produces this change is close to that of the epidermis, about 25 ° C.
- thermochromic layer can be applied by serigraphy or by flexography. It can also be a transferable layer.
- Fig. 1 is a perspective view with tearing of a document according to the invention.
- the document includes a support 1 on which is carried printed information 2 (usually a series of figures, figures, icons, etc.).
- This information 2 is in principle impossible to decipher without at least partially destroying a layer which conceals it from sight or any other means of reading (photography, photocopier, etc.).
- a layer protective 3 which separates it from an opaque layer 4, which has mechanical characteristics and physical such that it can only be removed by a deliberate scratching.
- This opaque layer 4 is itself covered with a layer 5 containing an ink thermochromic. As shown in Fig. 1, this layer 5 is covered by an outer layer 6, which can be decorative function.
- a classic method for fraudsters is to take note of the information sought in locally destroying the scrapable layer in a series of strategic points (global information being extracted both by interpolation and by extrapolation) then to mask surfaces - which, depending on their skill; can be extremely reduced - destroyed by their intervention.
- thermochromic pigments acts, on the contrary, as "active" protection due to the presence of patterns made with thermochromic pigments.
- the peculiarity of these pigments is to react quickly by visible color changes to a variation of the temperature.
- the legitimate recipient suffices of the document exposing it to a change in temperature: if the entire surface of the document or pattern has a matching color shift, it can conclude that the confidentiality of the information that is intended has been respected. If, on the contrary, localized areas or points retain their color original, even show a discordant variation, it must infer from this that the document has been forged.
- thermochromic pigments The presence (a priori improbable) of zones falsified with discordant variation would indicate that the fraudster, despite their high cost and their restricted distribution, was able to obtain thermochromic pigments.
- thermochromic layer 5 can itself be covered with a layer of overprint 6, consisting for example of a guilloche difficult to reconstitute after alteration. This overprinting is generally done in offset.
- thermochromic layer 5 Note that the presence of a layer of overprint 6 is not fundamental but that it nevertheless allows to produce cross effects interesting in combination with- the thermochromic layer 5.
- the layer scratchable 4 is applied by screen printing.
- the polyester gauze used for this process must have a mesh length of at least 50 ⁇ m, and th preferably between 60 and 80 ⁇ m.
- variable optical properties OVI SICPA producing including a variation from gold to green.
- Thermochromic inks are water-based and must be applied uniformly by frames with a density of 77 threads / cm. These inks change usually colored in intervals of 25, 30 and 47 ° C (we can quote for example blue inks whose color change threshold is set at 20 ° C).
- Photochromic inks can be used to make the other layers: these have a color change after being exposed to UV radiation (in particular, at a wavelength of 350-370 nm at a rate of 3 mW / cm 2 ) . A few seconds are enough to produce such a color change, which persists for several minutes.
- Flexography is a form of lithography in which the plate is flexible.
- BASF® Nyloflex FA
- a transfer machine such as the machine Gietz® allows to transfer a layer 5,6, by a combination of pressure and heat, on the layer removable 4.
- a pressure of the order of 200 kg / cm 2 and a temperature of approximately 125 ° C. are used.
- the transfer speed does not exceed a rate of 3600 documents per hour.
- the plates used are made of steel; the sheet used is, for example, a single sheet of gold or silver.
- thermochromic pigments are dispersed in the layer scratchable 4 itself, not in a layer 5 separate.
- the amount of pigments, in this case, is obviously more important since the layer is thicker and that colors should appear despite the charge opaque.
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- Engineering & Computer Science (AREA)
- Educational Technology (AREA)
- Multimedia (AREA)
- Credit Cards Or The Like (AREA)
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- Paints Or Removers (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Abstract
Description
L'invention concerne les documents imprimés supportant une information de type confidentiel masquée par une couche opaque grattable. Cette information ne peut normalement être révélée qu'après destruction par grattage de la dite couche.The invention relates to printed documents supporting hidden confidential information by an opaque scrapable layer. This information does not can normally only be revealed after destruction by scraping of said layer.
Cette catégorie de documents inclut notamment les billets de jeux dits "de loterie instantanée". Dans ces jeux, l'acheteur d'un billet peut immédiatement connaítre la nature gagnante ou non de son achat en grattant la couche, opération qui découvre.le message ou le numéro dissimulé par-dessous. Une telle couche grattable peut également être employée sur différents types de documents - tels que : ticket cadeau, bon commercial, etc - qui donnent lieu, par exemple, à l'attribution d'un prix ou d'un cadeau en fonction d'un message , d'un numéro, d'icônes, révélés par grattage de la couche opaque.This category of documents includes in particular so-called "instant lottery" game tickets. In these games, the ticket buyer can immediately know the winning nature or not of its purchase by scratching the layer, operation which discovers the message or number concealed from below. Such a scratch-off layer can also be used on different types of documents - such as: gift voucher, sales voucher, etc. - which give rise, for example, to the award of a prize or a gift based on a message, a number, of icons, revealed by scraping the opaque layer.
Tout document portant une partie d'information dont l'expéditeur souhaite garantir la confidentialité, comme par exemple un code secret à communiquer à une personne particulière peut également être muni d'une couche grattable.Any document bearing a part of information including the sender wishes to guarantee confidentiality, as for example a secret code to communicate to a person particular can also be provided with a layer scratch off.
La particularité commune à tous ces types de documents est que l'absence totale ou partielle de la couche grattable doit révéler clairement si le message sous-jacent a été éventuellement découvert. Si cette couche est altérée lorsque le document parvient à son destinataire normal, c'est que le secret du document a été percé, vraisemblablement dans un but frauduleux. The peculiarity common to all these types of documents is that the total or partial absence of the scratchable layer should clearly reveal whether the message underlying was eventually discovered. If this layer is corrupted when the document reaches its normal recipient is that the secrecy of the document has been pierced, presumably for a fraudulent purpose.
Il est fondamental que sur de tels documents l'intégrité de la couche grattable soit aisément vérifiable. L'absence même de parties infimes de la couche peut suffire au fraudeur pour prendre une connaissance suffisante d'un message caché, d'un code. Il convient donc que le document soit conçu de manière à ce que même l'altération d'une partie infime de la couche soit suffisamment remarquable et évidente pour éveiller les soupçons et mettre une telle fraude en évidence.It is fundamental that on such documents the integrity of the scrapable layer is easily verifiable. The very absence of tiny parts of the layer may be enough for the fraudster to take a sufficient knowledge of a hidden message, of a code. he the document should therefore be designed in such a way that that even the alteration of a tiny part of the layer is remarkable enough and obvious enough to arouse suspicion and highlight such fraud.
De même, la conception de tels documents doit être telle qu'il soit impossible, ou à tout le moins malaisé, d'ôter partiellement ou complètement la couche grattable pour prendre connaissance du message caché, pour ensuite la reconstituer, voire appliquer une nouvelle couche grattable de manière telle que le document paraisse intact et la fraude inexistante.Similarly, the design of such documents must be such as it is impossible, or at the very least difficult, to partially or completely remove the scrapable layer to read the hidden message, then reconstitute it, or even apply a new layer scratchable in such a way that the document appears intact and non-existent fraud.
Le document FR-2 595 987 décrit une couche opaque faite d'une encre cassante, recouverte d'un dessin imprimé compliqué, comme par exemple un guillochis, de sorte que le fraudeur qui opérerait par enlèvement et remplacement de la couche se verrait imposer le très délicat travail supplémentaire de reconstituer le dessin surimposé original.Document FR-2 595 987 describes an opaque layer made of brittle ink, covered with a design complicated print, such as a guilloche, so that the fraudster who would operate by abduction and replacement of the diaper would be imposed the very delicate additional work to reconstruct the drawing original overlay.
On connaít par WO 9640394 un procédé d'impression multicouche censé rendre impossible une reproduction après altération de la couche grattable.WO 9640394 discloses a printing method multilayer supposed to make reproduction impossible after alteration of the scrapable layer.
WO 95/14579 part d'une autre approche du problème : l'information cruciale n'est imprimée sur le document qu'au moment de la vente, via un procédé thermique contrôlé par un ordinateur central.WO 95/14579 starts from another approach to the problem: crucial information is only printed on the document that at the time of the sale, via a thermal process controlled by a central computer.
Suivant d'autres techniques, l'encre recouvrant l'information peut réagir avec certains solvants, de façon telle que toute tentative de décollement de la couche est aisément repérée. Using other techniques, the ink covering information can react with certain solvents, so that any attempt to detach the layer is easily identified.
Le document intermédiaire WO 005080A décrit une série de méthodes optionnelles et notamment la présence d'une couche thermochromique, pour éviter la fraude. Ce document, toutefois, ne prévoit pas, notamment, la combinaison de plusieurs couches à effets optiques particuliers.Intermediate document WO 005080A describes a series of optional methods including the presence a thermochromic layer, to avoid fraud. This document, however, does not, in particular, provide for the combination of several layers with optical effects individuals.
Il existe de nombreux exemples de mise en application des principes énoncés ci-dessus. Malheureusement, la pratique montre encore des manipulations frauduleuses : L'habileté mise en oeuvre a été suffisante pour donner l'impression que le document est vierge de tout grattage. Il en résulte bien évidemment pour l'émetteur du document la divulgation d'informations théoriquement confidentielles, ou, dans le cas de loteries, une perte financière ajoutée à un effet désastreux sur la crédibilité des jeux concernés.There are many examples of implementation application of the principles set out above. Unfortunately, practice still shows fraudulent manipulation: The skill implemented has was sufficient to give the impression that the document is free from scratching. It results well obviously for the sender of the document the disclosure theoretically confidential information, or, in the lotteries, a financial loss added to an effect disastrous on the credibility of the games concerned.
Un but de l'invention est d'obtenir des documents à couche grattable dans lesquels l'information cachée soit à l'abri de la fraude, notamment du fait du grattage et de la reconstitution frauduleuse de la couche masquant cette information, de la superposition ou du décollement et redéposition de cette couche.An object of the invention is to obtain documents to scratch-off layer in which the hidden information is safe from fraud, notably due to scratching and of the fraudulent reconstruction of the masking layer this information, overlay or peel and redeposition of that layer.
Un autre but de l'invention est d'obtenir des documents à couche grattable présentant un aspect plus élaboré que celui d'une simple image imprimée, même compliquée, et dont l'effet visuel soit remarquable.Another object of the invention is to obtain more scratch-resistant documents elaborate than that of a simple printed image even complicated, and whose visual effect is remarkable.
Un autre but de l'invention est que le contrôle puisse s'effectuer à tout moment dans la chaíne de distribution, sans que les documents en soient eux-mêmes affectés. Another object of the invention is that the control can be done at any time in the chain distribution, without the documents themselves affected.
L'objet de l'invention est un document imprimé
portant une information de type confidentiel masquée par
une couche opaque grattable dont la face extérieure
comprend une couche contenant des pigments réagissant par
un changement de couleur réversible à une variation de la
température ci-après dénommée "couche thermochromique",
dans laquelle les pigments sont disposés dans la
couche opaque grattable elle-même et/ou les pigments sont
dispersés dans une couche distincte apposée sur la face
externe de la couche opaque grattable, le document
comprenant une couche externe en surimpression sur la
couche thermochromique.The object of the invention is a printed document carrying information of the confidential type masked by a removable opaque layer, the outer face of which comprises a layer containing pigments reacting by a reversible change in color to a variation in temperature hereinafter called "thermochromic layer",
wherein the pigments are arranged in the opaque scrapable layer itself and / or the pigments are dispersed in a separate layer affixed on the external face of the opaque scrapable layer, the document comprising an external layer superimposed on the thermochromic layer.
Optionnellement, une des couches recouvrant l'information confidentielle comprend des pigments présentant un effet optique variable suivant les conditions environnantes.Optionally, one of the layers covering confidential information includes pigments having a variable optical effect depending on the surrounding conditions.
Cet effet optique variable dépend, par exemple, de l'angle sous lequel un observateur regarde le document.This variable optical effect depends, for example, on the angle from which an observer looks at the document.
Cet effet optique variable peut être obtenu par une encre irisée, ou par une encre réagissant de façon réversible à un rayonnement ultraviolet.This variable optical effect can be obtained by a iridescent ink, or by a reactive ink reversible to ultraviolet radiation.
Avantageusement, cet effet optique variable est obtenu par apposition d'une couche holographique.Advantageously, this variable optical effect is obtained by affixing a holographic layer.
De façon avantageuse, la température à laquelle se produit ce changement est voisine de celle de l'épiderme, soit environ 25°C.Advantageously, the temperature at which produces this change is close to that of the epidermis, about 25 ° C.
L'invention a également pour objet un procédé de fabrication d'un document tel que décrit ci-dessus qui comprend les opérations suivantes :
- apposition sur un support d'une information de type confidentiel;
- apposition sur au moins une partie de cette information d'une couche protectrice;
- dispersion dans une couche d'une encre contenant des pigments réagissant par un changement de couleur réversible à une variation de la température;
- apposition sur au moins une partie de la couche protectrice d'une couche opaque grattable ;
- apposition de la couche contenant lesdits pigments. La couche opaque grattable et la couche thermochromique pouvant être confondues.
- apposition en surimpression d'une couche externe imprimée.
- affixing confidential information;
- affixing a protective layer to at least part of this information;
- dispersion in a layer of an ink containing pigments reacting by a reversible color change to a change in temperature;
- affixing on at least part of the protective layer with a removable opaque layer;
- affixing of the layer containing said pigments. The opaque scrapable layer and the thermochromic layer can be confused.
- superimposition of a printed outer layer.
Ce procédé peut, en outre, comprendre l'opération suivante :
- dispersion dans la couche externe d'une encre présentant un effet optique variable suivant les conditions environnantes.
- dispersion in the outer layer of an ink having a variable optical effect depending on the surrounding conditions.
La couche thermochromique peut être apposée par sérigraphie ou par flexographie. Il peut aussi s'agir d'une couche transférable. The thermochromic layer can be applied by serigraphy or by flexography. It can also be a transferable layer.
D'autres particularités et avantages de l'invention ressortent de la description ci-après d'une forme de réalisation particulière, référence étant faite aux dessins annexés dans lesquels :Other features and advantages of the invention emerge from the description below of a form of particular realization, reference being made to annexed drawings in which:
La Fig. 1 est une vue en perspective avec arrachement d'un document suivant l'invention.Fig. 1 is a perspective view with tearing of a document according to the invention.
Le document comprend un support 1 sur lequel est
portée une information imprimée 2 (en général, une série
de chiffres, de figures, d'icônes, etc.).The document includes a
Cette information 2 est en principe impossible à
déchiffrer sans détruire au moins partiellement une
couche qui la dérobe au regard ou à tout autre moyen de
lecture (photographie, photocopieuse, etc.).This
L'information 2 est recouverte d'une couche
protectrice 3, qui la sépare d'une couche opaque 4,
laquelle est dotée de caractéristiques mécaniques et
physiques telles qu'elle ne peut être enlevée que par un
grattage délibéré. Cette couche opaque 4 est elle-même
recouverte d'une couche 5 contenant une encre
thermochrome. Comme le montre la Fig. 1, cette couche 5
est recouverte par une couche externe 6, qui peut être à
fonction décorative.
Une méthode classique pour les fraudeurs consiste à prendre connaissance de l'information convoitée en détruisant localement la couche grattable en une série de points stratégiques (l'information globale étant extraite à la fois par interpolation et par extrapolation) puis à masquer les surfaces - qui, en fonction de leur habileté; peuvent être extrêmement réduites - détruites par leur intervention.A classic method for fraudsters is to take note of the information sought in locally destroying the scrapable layer in a series of strategic points (global information being extracted both by interpolation and by extrapolation) then to mask surfaces - which, depending on their skill; can be extremely reduced - destroyed by their intervention.
Avec des documents classiques, si le fraudeur est adroit, il peut parvenir à masquer de façon pratiquement indécelablé les endroits altérés. Assez paradoxalement, plus les motifs recouvrant la couche grattable sont compliqués, plus il lui sera facile, au gré de discontinuités dans la cpuleur ou dans les traits, de maquiller son intervention. Inversement, des motifs très simples peuvent être masqués par des à-plat.With conventional documents, if the fraudster is dexterous, he can mask practically undetected places altered. Quite paradoxically, plus the patterns covering the scrapable layer are complicated, the easier it will be, according to discontinuities in the module or in the lines, make up his intervention. Conversely, very simple can be hidden by flat.
Toutes les protections connues agissent donc comme des protections "passives".All known protections therefore act as "passive" protections.
Le document suivant l'invention agit, au contraire, comme une protection "active" du fait de la présence de motifs réalisés à l'aide de pigments' thermochromes. La particularité de ces pigments est de réagir rapidement par des changements de couleur visibles à une variation de la température.The document according to the invention acts, on the contrary, as "active" protection due to the presence of patterns made with thermochromic pigments. The peculiarity of these pigments is to react quickly by visible color changes to a variation of the temperature.
En l'occurrence, il suffit au destinataire légitime du document de l'exposer à un changement de température : si l'intégralité de la surface du document ou du motif présente un virage de couleur concordant, il peut en conclure que la confidentialité de l'information qui lui est destinée a été respectée. Si, au contraire, des zones ou des points localisés conservent leur couleur originale, voire présentent une variation discordante, il doit en déduire que le document a été falsifié.In this case, the legitimate recipient suffices of the document exposing it to a change in temperature: if the entire surface of the document or pattern has a matching color shift, it can conclude that the confidentiality of the information that is intended has been respected. If, on the contrary, localized areas or points retain their color original, even show a discordant variation, it must infer from this that the document has been forged.
Aucun instrument complexe n'est nécessaire pour procéder à cette vérification : il suffit de mettre le document en contact avec la peau, par exemple en y apposant un doigt.No complex instrument is needed to proceed with this verification: just put the document in contact with the skin, for example in y affixing a finger.
Si les zones falsifiées conservent leur couleur ou ton original, on peut en déduire que le document a été falsifié à l'aide de pigments classiques, lesquels ne réagissent pas à une variation de température.If the falsified areas retain their color or your original, we can deduce that the document was falsified using conventional pigments, which do not not react to a change in temperature.
La présence (a priori improbable) de zones falsifiées présentant une variation discordante indiquerait que le fraudeur, en dépit de leur coût élevé et de leur diffusion restreinte, a pu se procurer des pigments thermochromes.The presence (a priori improbable) of zones falsified with discordant variation would indicate that the fraudster, despite their high cost and their restricted distribution, was able to obtain thermochromic pigments.
Toutefois, la variété des caractéristiques que l'on peut imposer à ces pigments (notamment par mélange) ramène à un taux de probabilité pratiquement nul la concordance des couleurs avec celles d'une série d'impressions déterminée.However, the variety of characteristics that one can impose on these pigments (in particular by mixing) brings back to a practically zero probability rate the concordance of colors with those of a series of determined impressions.
Cette variation de couleur étant réversible, il est possible d'effectuer des vérifications non destructives, ponctuelles ou à grande échelle, en n'importe quel point de la chaíne de distribution, les documents contrôlés conservant toute leur intégrité.As this variation in color is reversible, it is possible to carry out non-destructive checks, point or large-scale, at any point of the distribution chain, the documents checked retaining all their integrity.
Comme représenté à la Fig. 1, la couche thermochrome
5 peut être elle-même recouverte d'une couche en
surimpression 6, constituée par exemple d'un guillochis
difficilement reconstituable après altération. Cette
surimpression se fait généralement en offset.As shown in Fig. 1, the
On notera que la présence d'une couche de
surimpression 6 n'est pas fondamentale, mais qu'elle
permet néanmoins de produire des effets croisés
intéressants en association avec- la couche thermochrome
5.Note that the presence of a layer of
Suivant un premier procédé d'impression, la couche grattable 4 est appliquée par sérigraphie.According to a first printing process, the layer scratchable 4 is applied by screen printing.
La gaze de polyester utilisée pour ce procédé doit avoir une longueur de maille d'au minimum 50 µm, et dé préférence entre 60 et 80 µm.The polyester gauze used for this process must have a mesh length of at least 50 µm, and th preferably between 60 and 80 µm.
On emploiera donc en principe une soie de 77 à 100 fils/cm.We therefore use in principle a silk of 77 to 100 son / cm.
Dans ce procédé, on peut utiliser des encres à propriétés optiques variables OVI SICPA (produisant notamment une variation de l'or au vert).In this process, inks can be used. variable optical properties OVI SICPA (producing including a variation from gold to green).
On peut également utiliser des encres transparentes irisées (passant du violet au vert), des encres semi-transparentes à deux tons (passant par exemple du bleu au vert) ou des encres semi-opaques irisées (passant de l'or au beige). Toutes ces encres produisent une variation de couleur suivant leur angle d'observation.You can also use transparent inks iridescent (going from purple to green), semi-transparent inks two-tone (for example going from blue to green) or semi-opaque iridescent inks (from gold beige). All of these inks produce a variation of color according to their angle of observation.
Les encres thermochromes sont à base d'eau et doivent être appliquées de façon homogène par des trames d'une densité de 77 fils/cm. Ces encres changent généralement de couleur dans des intervalles de 25, 30 et 47°C (on peut citer par exemple des encres bleues dont le seuil de changement de couleur s'établit à 20°C).Thermochromic inks are water-based and must be applied uniformly by frames with a density of 77 threads / cm. These inks change usually colored in intervals of 25, 30 and 47 ° C (we can quote for example blue inks whose color change threshold is set at 20 ° C).
On peut utiliser pour réaliser les autres couches des encres photochromiques : ces dernières présentent un changement de couleur après avoir été exposées à un rayonnement UV (notamment, à une longueur d'onde de 350-370 nm à raison de 3 mW/cm2). Quelques secondes suffisent pour produire un tel changement de couleur, qui persiste plusieurs minutes.Photochromic inks can be used to make the other layers: these have a color change after being exposed to UV radiation (in particular, at a wavelength of 350-370 nm at a rate of 3 mW / cm 2 ) . A few seconds are enough to produce such a color change, which persists for several minutes.
Suivant une autre forme de réalisation, on a recours à un procédé d'impression flexographique. La flexographie est une forme de lithographie dans laquelle la plaque est flexible. On peut utiliser par exemple une plaque en Nyloflex FA (BASF®).Pour pouvoir transférer suffisamment d'encre (de façon à obtenir une répartition uniforme), on peut presser plusieurs couches superposées. Ce procédé s'applique tant pour les encres variables que pour les encres thermochromiques ou photochromiques décrites ci-dessus.In another embodiment, use is made to a flexographic printing process. Flexography is a form of lithography in which the plate is flexible. One can use for example a plate in Nyloflex FA (BASF®). To be able to transfer enough ink (so as to obtain a uniform distribution), can press several superimposed layers. This process applies to both variable inks and thermochromic or photochromic inks described above.
Il est également possible d'appliquer la couche grattable décrite plus haut en ayant recours à un transfert à chaud ou à froid.It is also possible to apply the coat scratcher described above using a hot or cold transfer.
Une machine de transfert, telle que la machine
Gietz® permet de transférer une couche 5,6, par une
combinaison de pression et de chaleur, sur la couche
grattable 4.A transfer machine, such as the machine
Gietz® allows to transfer a
On utilise une pression de l'ordre de 200 kg/cm2 et une température d'environ 125°C. La vitesse de transfert ne dépasse pas une cadence de 3600 documents par heure. Les clichés utilisés sont en acier ; la feuille utilisée est, par exemple, une feuille simple d'or ou d'argent.A pressure of the order of 200 kg / cm 2 and a temperature of approximately 125 ° C. are used. The transfer speed does not exceed a rate of 3600 documents per hour. The plates used are made of steel; the sheet used is, for example, a single sheet of gold or silver.
On peut transférer de la même manière également des
hologrammes, des cinégrammes ou d'autres couches à
diffraction sur la couche grattable 4.You can also transfer
holograms, cinegrams or other layers to
diffraction on the
Suivant une variante non représentée à la Fig. 1,
les pigments thermochromes sont dispersés dans la couche
grattable 4 elle-même, et non dans une couche 5
distincte.According to a variant not shown in FIG. 1
thermochromic pigments are dispersed in the layer
scratchable 4 itself, not in a
La quantité de pigments, dans ce cas, est évidemment plus importante puisque la couche est plus épaisse et que les couleurs doivent apparaítre en dépit de la charge opaque.The amount of pigments, in this case, is obviously more important since the layer is thicker and that colors should appear despite the charge opaque.
Claims (12)
- Printed document carrying information of confidential nature (2) masked by a opaque scratch-off layer (4) whose outer face comprises a layer (5) containing thermochromic pigments reacting by a reversible change of colour to a variation in temperature, characterized in that the pigments are disposed in the opaque scratch-off layer (4) itself and/or this document comprises an outer layer (6) overprinted on the layer containing the thermochromic pigments.
- Document according to Claim 1, characterized in that one of the layers (4,5,6) covering the confidential information comprises pigments exhibiting an optical effect that varies according to the surrounding conditions.
- Document according to Claim 2, characterized in that the variable optical effect depends on the angle at which an observer looks at the document.
- Document according to any one of Claims 2 and 3, characterized in that the variable optical effect is obtained by an iridescent ink.
- Document according to any one of Claims 2 to 4, characterized in that the variable optical effect is obtained by an ink reacting in a reversible manner to ultraviolet radiation.
- Document according to any one of Claims 2 to 5, characterized in that the variable optical effect is obtained by the affixing of a holographic layer.
- Document according to any one of the preceding claims characterized in that the change in colour of the pigments occurs at a temperature of about 25°C.
- Method of manufacturing a document according to any one of the preceding claims, characterized in that it comprises the following operations:affixing information of confidential nature (2) on a support;affixing a protective layer over at least a part of this information (2);dispersion in a layer (4,5) of an ink containing thermochromic pigments;affixing an opaque scratch-off layer (4) over at least a part of the protective layer;affixing the layer (4,5) containing the said pigments, the opaque scratch-off layer (4) and the layer (4,5) containing the thermochromic pigments being able to be one and the same;affixing an outer printed layer (6) by overprinting.
- Manufacturing method according to Claim 8, characterized in that it furthermore comprises the following operation:dispersion in the outer layer of an ink having an optical effect that varies according to the surrounding conditions.
- Manufacturing method according to any one of Claims 8 and 9, characterized in that the layer containing the thermochromic pigments can be affixed by silk screen printing.
- Manufacturing method according to any one of Claims 8 to 10, characterized in that the layer containing the thermochromic pigments can be affixed by flexography.
- Manufacturing method according to any one of Claims 8 to 10, characterized in that the layer containing the thermochromic pigments is a transferable layer.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT99870136T ATE257736T1 (en) | 1999-07-01 | 1999-07-01 | DOCUMENT WITH SCRATCHABLE, FRAUDULENT READING LAYER |
| EP99870136A EP1064973B1 (en) | 1999-07-01 | 1999-07-01 | Document with scratch-off layer precluding fraudulent reading |
| DE69914187T DE69914187T2 (en) | 1999-07-01 | 1999-07-01 | Document with a scratchable, fraudulent reading layer |
| ES99870136T ES2214005T3 (en) | 1999-07-01 | 1999-07-01 | DOCUMENT WITH RASCABLE LAYER THAT PREVENTS FRAUDULENT READING. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99870136A EP1064973B1 (en) | 1999-07-01 | 1999-07-01 | Document with scratch-off layer precluding fraudulent reading |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1064973A1 EP1064973A1 (en) | 2001-01-03 |
| EP1064973B1 true EP1064973B1 (en) | 2004-01-14 |
Family
ID=8243861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99870136A Expired - Lifetime EP1064973B1 (en) | 1999-07-01 | 1999-07-01 | Document with scratch-off layer precluding fraudulent reading |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1064973B1 (en) |
| AT (1) | ATE257736T1 (en) |
| DE (1) | DE69914187T2 (en) |
| ES (1) | ES2214005T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010130041A1 (en) * | 2009-05-11 | 2010-11-18 | Black & White Paper Mfg. Ab | A full colour variable instant win lottery ticket made of a light core substrate |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2824019B1 (en) * | 2001-04-30 | 2004-01-23 | Gemplus Card Int | MEDIUM INCLUDING CONFIDENTIAL INFORMATION |
| DE20207023U1 (en) * | 2002-05-03 | 2002-08-14 | Schreiner Gmbh & Co Kg | Label to hide information |
| NL2000012C2 (en) * | 2006-02-20 | 2007-08-21 | Jan Willem Takens | Prepaid unit carrier, e.g. prepaid card for mobile phone, has continuous surface layer forming boundary between removable layer and adjoining carrier surface |
| DE202006015989U1 (en) | 2006-10-19 | 2007-02-08 | Leonhard Kurz Gmbh & Co. Kg | Safety document with safety layer that can be scratched-off e.g. for confidential information such as pin numbers, has continuous opaque resist coating which covers document |
| CA2709829A1 (en) * | 2007-11-13 | 2009-05-22 | Black & White Paper Mfg. Ab | Instant win lottery ticket with full colour security area and method of manufacture |
| WO2013014678A1 (en) * | 2011-07-22 | 2013-01-31 | Zircon Technologies India Limited | Method of providing a scratch-able printed matter |
| DE102014107376A1 (en) * | 2013-12-19 | 2015-06-25 | Manroland Web Systems Gmbh | Printed product with access code |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005080A1 (en) * | 1998-07-21 | 2000-02-03 | Scientific Games International Ltd. | Security printing of cards and the like |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2595987B1 (en) | 1986-03-20 | 1990-12-21 | Hautes Vosges Impressions | INKING PROCESS FOR FREE-COVERS |
| GB2188283B (en) * | 1986-03-21 | 1990-01-04 | Advertising And Marketing Asso | Improvements in or relating to prize-generating printed substrates |
| US5037101A (en) * | 1990-06-19 | 1991-08-06 | Mcnulty James P | Hologram game card |
| US5282651A (en) * | 1991-04-15 | 1994-02-01 | Frank Alonso | Trading cards and method of concealing and revealing information thereon |
| US5193854A (en) * | 1992-02-28 | 1993-03-16 | Babn Technologies Inc. | Tamper-resistant article and method of authenticating the same |
| SE9303860D0 (en) | 1993-11-22 | 1993-11-22 | Markpoint Printer Ab | Information carrier for permanent information |
| US5683090A (en) | 1995-06-07 | 1997-11-04 | Zeile; Kim A. | Sports chance game apparatus and method of playing same |
| US5769458A (en) * | 1995-12-04 | 1998-06-23 | Dittler Brothers Incorporated | Cards having variable benday patterns |
-
1999
- 1999-07-01 EP EP99870136A patent/EP1064973B1/en not_active Expired - Lifetime
- 1999-07-01 AT AT99870136T patent/ATE257736T1/en not_active IP Right Cessation
- 1999-07-01 ES ES99870136T patent/ES2214005T3/en not_active Expired - Lifetime
- 1999-07-01 DE DE69914187T patent/DE69914187T2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005080A1 (en) * | 1998-07-21 | 2000-02-03 | Scientific Games International Ltd. | Security printing of cards and the like |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010130041A1 (en) * | 2009-05-11 | 2010-11-18 | Black & White Paper Mfg. Ab | A full colour variable instant win lottery ticket made of a light core substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2214005T3 (en) | 2004-09-01 |
| EP1064973A1 (en) | 2001-01-03 |
| DE69914187T2 (en) | 2004-09-02 |
| DE69914187D1 (en) | 2004-02-19 |
| ATE257736T1 (en) | 2004-01-15 |
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